{
  "manageEntity": {
    "action": "Save",
    "entityId": "1352230097",
    "entityType": "Track",
    "nonce": "0xf796c3e4e3e17e85b333bf505de077da4092fe4da33c095458507a2a48bcd39b",
    "signature": "0x27d51986420600ad0d5a01c68d80c1103a510369b179b016d6c9e8e55b1c7cf72d437abb810dfc4238642d5109e90c1448f69b57768f777f4c307a1c8dfc858f1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}