{
  "manageEntity": {
    "action": "Save",
    "entityId": "552776622",
    "entityType": "Track",
    "nonce": "0x940a10386b89259c77d929391b596e6bb86550583761a64275162727d12f5265",
    "signature": "0xd36613c0d4f9c5c3b1f84adbd599c9f8637fc79ca7ef22ecde5fa8478f6687801af26813b9c88c649e385736e177ddf1ceab5f86bb9f5b46abb15baaa25e2ece1b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}