{
  "manageEntity": {
    "action": "Save",
    "entityId": "1579737191",
    "entityType": "Track",
    "nonce": "0x125d09465f6913d1bc0cb181db615e5601e182005f66e154b3a85365723a9b6f",
    "signature": "0x4416cb05f1f486788a61f9344d1040fd9332763401682ec890e26d737fda673f320a6cd3809aa413b0bacd950d2aa9b4cfe16be6c7ccaa1f5a90d17ce0b129081c",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}