{
  "manageEntity": {
    "action": "Save",
    "entityId": "31131193",
    "entityType": "Track",
    "nonce": "0xbd5e5548ba57e92723ba4082a11d4051ad79d4c802d0a416beec2c31100154ba",
    "signature": "0xf65cbc0190d5209a996676a852c7a1e6c9fa7fda8882d092d1e6d753de5ea6bc199cf23d2a5e73e8b299d7adf9e3dfc90b1aff47e3976b62f507525a0608222d1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}