{
  "manageEntity": {
    "action": "Save",
    "entityId": "491119800",
    "entityType": "Track",
    "nonce": "1793342033906344429",
    "signature": "0x54bd2df09ea1fe32e8bf777fef4d5f93ade9d3a36f19a45bcf7658e4cc078150147cdc0fa80a8657a0dc06323aa7882ad18e44beb7afe7a517635a08067667b61c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}