{
  "manageEntity": {
    "action": "Save",
    "entityId": "17016364",
    "entityType": "Track",
    "nonce": "0x76e7ae6c49591b249934a00eb2e02eed00ea8ddc703b7c065cc0e14494a0b020",
    "signature": "0x4868e42df4e8254148856c058bcd25e56a5e430d24cc28e59d9766e148f506bf5e324d53e3291ce824e084c0d565f37fed5487bc6dc75adf33e8f21c8cfd4cbd1c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}