{
  "manageEntity": {
    "action": "Save",
    "entityId": "1125581063",
    "entityType": "Track",
    "nonce": "0x6647bdcdfe7874d797ca87f52ae20c388e63b054654f660e5fc9ccf76bbe9793",
    "signature": "0xd9d0f962681db1f2b9a1e5cdd81969827f6211c4c8016ae093d7624e7e057129571b82a5850f768be0b2fe35ca3c3505c3e1331fba00b9d6f85d12210cb413cf1b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}