{
  "manageEntity": {
    "action": "Save",
    "entityId": "2125197170",
    "entityType": "Track",
    "nonce": "0x861ccbfdd2185ea022c1380179fe947ac0d635154cc0cf76398634c9d8418d57",
    "signature": "0x5c1439d054a0e52d93ccbd907761a9b5f6b114b620e112b56ff7fc87ef5dc23b721c97b11a3af2e90012b60935e8ae36085be7ae226630b008fcefec93cbcf1c1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}