{
  "manageEntity": {
    "action": "Save",
    "entityId": "1429601071",
    "entityType": "Track",
    "nonce": "0x834d9955fd66df1161e511e81a7c151275f66d9e3e4da63c05a033f39062dee9",
    "signature": "0x48c367684eb2d9c7ea57ec18d49a4aa0a0e708d337f541a4cf90bc274740e2901f284409f3a6b449ad25936ca22c1c41245d1b3bf1e1dd631d458ae6ef729f971b",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}