{
  "manageEntity": {
    "action": "Save",
    "entityId": "1363576718",
    "entityType": "Track",
    "nonce": "0x5a578fc7932589a8bdaf2df066290e11437712e44ff1987a1c3b4861464ca4a1",
    "signature": "0x744fb8fe45bdf63f20418e468e6eb7bb02fc083d786f0b1235152ab888814d770f6c889821e55d13db62d3eca6b3d99e623a70c72426ba5bc369e09ac838884b1c",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}