{
  "manageEntity": {
    "action": "Save",
    "entityId": "152215357",
    "entityType": "Track",
    "nonce": "0x9653b1aed645074510951709462a7775266a51a6b4e03d1b4796411c1492d3a5",
    "signature": "0xec5c2a0a4ceeeb91d50099b43a4f36927922ecc2e9dce7b428220ee26afa7939795f9ef71ace3eaa88fdf067cfbb4f7cfa7f586437d45a4e53aed12fdcbcd3711b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}