{
  "manageEntity": {
    "action": "Save",
    "entityId": "1841021246",
    "entityType": "Track",
    "nonce": "0xa000f0b53977a7a8126be7be0656710500e00ca19e3f6bff19ba83fe4b208c29",
    "signature": "0xed53363730aed1a4e377d46542e231f23bf8c647ed1ac7167de900fc95fa63b11e57ad074d68b2a740371deb1ca9b8937c2e6e7599eb81b15e8c64fdbd9780b41b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}