{
  "manageEntity": {
    "action": "Save",
    "entityId": "757389109",
    "entityType": "Track",
    "nonce": "0xa24b0bc2734caf4cea6fe1239e490da70e9fc4bcf5ca0353d0f18b141a09685d",
    "signature": "0xfe637abf6cc70fd93e81485b87ffa296ef6eea15eaa0f65fac31a80d4093fd79246f6a399c61ba2844e9f5b09edab0aea5073245e3a3e5f02d779ef32e0699781c",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}