{
  "manageEntity": {
    "action": "Save",
    "entityId": "345195100",
    "entityType": "Track",
    "nonce": "0x8d326903f8de35849e60747258ab1167ee13dd4c86b119b2850b43748ef47881",
    "signature": "0x8265b12bf5def4d1e941095259304fb957525c1994bd981612d92f8f91e83f3276bebf25df0417e4fe19f3de80928634922809b3ecdb10a8bf20d9153ebb97651c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}