{
  "manageEntity": {
    "action": "Save",
    "entityId": "623351900",
    "entityType": "Track",
    "nonce": "0xebae371ad32190eb8b38ceb5a8ce202e4f95507411f43e3cc04faea0510dbcb8",
    "signature": "0xc9efd61aa3b23f9fd0767f0643eb8cce483259bbebf0fee93604d9d322a522761a5a676033847fb8996ecb0064dd16d144a59411b24d476bb5d26ab84482e24e1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}