{
  "manageEntity": {
    "action": "Save",
    "entityId": "397090722",
    "entityType": "Track",
    "nonce": "0x40d23ac0e5b39ee0a558fdffceefcf180ff91763431eeb4d5da2191ad62554a7",
    "signature": "0xaeff5ca96f3acea2e1893c8bb6fef8ebde4c506a14deee13c41c3eba3a7cd65b6d1f6a8c71b7bce3de2c9c07d414a989ec41eeac6853028aa499694a9b92e56a1b",
    "signer": "0x061A60900C738C67bcf3F9Cb7Fe8f703DbEc8Ee0",
    "userId": "718327235"
  }
}