{
  "manageEntity": {
    "action": "Save",
    "entityId": "950540022",
    "entityType": "Track",
    "nonce": "0x002b1a009c77750b5330cb4829148c4d2bfd19e39c8cf3e5a7cad51c48614019",
    "signature": "0x3356e415cb41c1ce7b24de9f77116f08190da705c9401dbcefbb4956387d6b7602319612f5dcdcee5700312e985eac34e5e462b8142b22b6a4fda82838cdbbb91c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}