{
  "manageEntity": {
    "action": "Save",
    "entityId": "1549057913",
    "entityType": "Track",
    "nonce": "0x6184833b24cc7bc1ba72d6d596abb9b21232a25bb3654709a42f9e6086c71f4c",
    "signature": "0x699a1f42e430ac694bf1dcdce9900ef6c474f22b87c3ff7f44855552c5331eea0885b2f0e47baa6cb625550842f4d4d5c65da44490a0a5b67955ea43cf575cc11c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}