{
  "manageEntity": {
    "action": "Save",
    "entityId": "363605710",
    "entityType": "Track",
    "nonce": "0xade3d5976fb50d271c722b6f168f7340f57edf44e723d24f7f0af46068686a17",
    "signature": "0x9f1c1c362ea80bd141ed6eb73df073b2ec08b7d63ad9bda6a50b3a7a07bb45f71471424d4f9cfcbb9d1d1262a40619586d668ce209334590bb80e1b9f66a11a51c",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}