{
  "manageEntity": {
    "action": "Save",
    "entityId": "1768912075",
    "entityType": "Track",
    "nonce": "0x4bd83118fa8eeb1cd7fccaa950f4a6c537c4db346df946cf5f2933d173e7b64a",
    "signature": "0xd8646312e79cc7e0de913f802e62f8ad071fd7250aec77726e0371ffbb2670880724ef9fc065ad4aecdce11202bf6a467dcc595a8072d43b5f70b5f7d9dd7c0f1b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}