{
  "manageEntity": {
    "action": "Save",
    "entityId": "1882278145",
    "entityType": "Track",
    "nonce": "0x4e8242a240e05d9d0a2d4e4d0b0c96bcc9494d83fb8b8900597df6faba140ecb",
    "signature": "0x90ab985a63bd60b5630f0f31ba4abc19a0b235cb4a7aad51b34ccf5cbf790814622a3c9d23c5ee00567b50b838c93920fc814cc7b93d9af29862a2b5721a6b501b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}