{
  "manageEntity": {
    "action": "Save",
    "entityId": "990058",
    "entityType": "Track",
    "nonce": "0xc41c04261fafcbe72ffe6ea63b76516791e1abd3c47c809b877eeaf09d552924",
    "signature": "0x2475b3f899c9690480d28ac8739b05e99ac405d22e0c41efb58f45c8c8c1437f0a73bc987adfb704411e6d28dc332d91309cd5b670ab14ec602c48dfa032a4161b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}