{
  "manageEntity": {
    "action": "Save",
    "entityId": "1514675854",
    "entityType": "Track",
    "nonce": "0xc6a1c43d3ffae36b7cbf9ff57d85f6f7f2c84caf4ade13b624243beb1b837407",
    "signature": "0x55f87d6996d875230cf382b8824f3aa370a5791afd4b08dfa53e0d8beb07b8f76e57b17201af11b9393ab801509bec177e70894e0df8d694004edbf65b0129301c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}