{
  "manageEntity": {
    "action": "Save",
    "entityId": "787494772",
    "entityType": "Track",
    "nonce": "0xbca435ba504c6a0464203741e80eddeb6efe822140bbfd7f1db435452a335ded",
    "signature": "0xac0a4106b69e91d97a4308eb7b4f38a69dd4d772ea204e99c379f6c47acc8b10318573725cbef3dabb48cfde58a9d0899a98a707516385b210455f4703494f921b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}