{
  "manageEntity": {
    "action": "Save",
    "entityId": "218175223",
    "entityType": "Track",
    "nonce": "0x5fbadaea96fab95f3f542399a65726d9fd4932dec3c7d707e594b64e2f956415",
    "signature": "0xda5fc2b07d9813dd73b22a8875e411e5dba6bcb41096a2d2768f355678e9385c5592e424fea59486253d7a9fbfa83cc6b043e29482cbe7220a73a4209ae1eb431c",
    "signer": "0x14d7618B82Da4e7176FDe32e4379943eCd69798D",
    "userId": "238125623"
  }
}