{
  "manageEntity": {
    "action": "Save",
    "entityId": "1876653985",
    "entityType": "Track",
    "nonce": "0x99a02b8cbd9c33621aaf8180c4641fd1ca7dc68495da176be9fe4849add3fa8a",
    "signature": "0x85b02925327c98832548c0b711d35c3fb98048caa646092dae3630d83925813f3106e4ca3fb6e3b570ed12e8921cea27e8b082eb64e86d4f797607a70ccec24c1c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}