{
  "manageEntity": {
    "action": "Save",
    "entityId": "1482996866",
    "entityType": "Track",
    "nonce": "0x9d97ff4fb994c1d040b1d2a921266010e469766e6474b9c2075c84ac21922a5b",
    "signature": "0x19006d20d9fcbd21bd5bd13fcb6efc3e2275e3a3f4d85f2b931f9103bcd3ca885cf1438488ce2ad47aba214c32fdeb3cf16d15537fc739d7f9339588a4bae4b91c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}