{
  "manageEntity": {
    "action": "Save",
    "entityId": "77822976",
    "entityType": "Track",
    "nonce": "0x94638131171b7a8c5a583fae064cfbfd9ced724580a334e6c790404d65f0d18f",
    "signature": "0x3f20f81014995035565ea7103044693863353262bed34774ff12da771064b7be107ce439f1dae4c911f95af7e364dbd4697f42ed38909553954ddefb656a33a91b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}