{
  "manageEntity": {
    "action": "Save",
    "entityId": "1808068181",
    "entityType": "Track",
    "nonce": "0xb2d0c490b0c3d8059079d353746c337835591b56f2dfff04a1c4bc88769d5861",
    "signature": "0xb0711187e3c7e8a580e13832693ccbe5cd228085fcb7465cceaa8347a9f97b9966ddf332464a1e47266e26b916e610b3de6be5c7eb6a237a8040b601fa3b22841b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}