{
  "manageEntity": {
    "action": "Save",
    "entityId": "470940",
    "entityType": "Track",
    "nonce": "0x5a671262f531033928e20f7fa9fbd78fa4c9a0e9bc72e5b38b2576aface7987e",
    "signature": "0x99ddd6ebb8750e33d3525b8834115f46d17219c13ac0cf67ec189d140715a0b373fb3c81120563cb1594f026d86461be1fc2aa256d1e9144fa307d7aa28e82ca1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}