{
  "manageEntity": {
    "action": "Save",
    "entityId": "330453131",
    "entityType": "Track",
    "nonce": "0xd2efc51f5f779dfbbf77a55c676fe163523332260178412f9a2993df07088fb0",
    "signature": "0xa721d1b3881b79706de2f7f7d2f0606123b0ef9e7239c6c91adaade00cd6f902441a34e46687fa796d42986438a6b340ca4d22483d579fc5d41f9bdcce57010d1c",
    "signer": "0x19EDB4c1a8740c323f6e57B80F3422C01875289e",
    "userId": "390804"
  }
}