{
  "manageEntity": {
    "action": "Save",
    "entityId": "1723566456",
    "entityType": "Track",
    "nonce": "0x47adccb6301f57018d79995ffb8f0f551a127827756a721f2eba83e9238b3ff6",
    "signature": "0x6e8547a823bb5eb2c1b396bd6cdf17f663de05f00a7d4069318697b9774af5324fdc15c32a2fb8c6c112cd2cd5d5390c69b68c3f552195c801ab49ce4e7980711b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}