{
  "manageEntity": {
    "action": "Save",
    "entityId": "771546216",
    "entityType": "Track",
    "nonce": "0x8033a2e8b9aee482d9d10df739076281f7e7f9987ce665acfeeb8a039f89e95e",
    "signature": "0xd8abd06cdbe8bd965026ce6a2d3fdb7ad5d89d6a02aa4fffd2b98ac125386b2262e940fb99c3b15a36b99f7058aae604f9488f28c1a89c55cb36b8a0de38a2c21c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}