{
  "manageEntity": {
    "action": "Save",
    "entityId": "1467261277",
    "entityType": "Track",
    "nonce": "0xa957b5b1ff247ec42f5886bb6009820d5e365b7d1c1e08935a5b612d858b86b9",
    "signature": "0xfa1df5394101aea8a770575169eb36ec018fd1235f325419e5fb2abedec1ee8f436579ae2d470795be2b7a50ebe98fed0b7f25b4f806daf7d240a76ed0f289fc1b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}