{
  "manageEntity": {
    "action": "Save",
    "entityId": "1112181963",
    "entityType": "Track",
    "nonce": "0x3aca5208c38acb85ef53b7575d60c69a2604cfb5de39fe333b13a1b2cea4001a",
    "signature": "0xb25c6dff66abace06f76e7a880187c74525d498d00544eca0ce3ef284d9dfda322bcd9753d2d3c89e1c031015cd95ad48d991a43fd24999d6174bf6864eba9001c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}