{
  "manageEntity": {
    "action": "Save",
    "entityId": "603032",
    "entityType": "Track",
    "nonce": "0xa86097326580a64dc807ac3919e5127641892c10f7a30797deada49f582524ae",
    "signature": "0x73cd9cc2c9ca2890bf69a739d0d895c146eb1c4b0824ad8e970a9bfa6c1d2d4445ad1a02d46689358bbbf47cef5ed25d8014295535e6bea7cf888054c3beafd01c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}