{
  "manageEntity": {
    "action": "Save",
    "entityId": "139414165",
    "entityType": "Track",
    "nonce": "0x7f103ea61c52fd5fbb5454fabbb8bbffb6025a8418c2e04880ce26e56ffae9fd",
    "signature": "0x1f0c5cb96fc230838e81b9bec3ea44b9406e68c22ec3a451ac99ca83cd6bfed87d8ed7c7d0405773a5a3be082a66e73710333cac3fc0bb238d629c30ac4379711b",
    "signer": "0x6245d270201FE6e26477efA986E8C4035bF65C71",
    "userId": "36222594"
  }
}