{
  "manageEntity": {
    "action": "Save",
    "entityId": "418079911",
    "entityType": "Track",
    "nonce": "0x673551170d7fe015a3e655887f2868a07d6901f419e853bb25775848ce23a61b",
    "signature": "0x58a68348579088f98386c4c13f74e3cd62d35c48bec23d557834a306f0ef626f51d67b174ecc6ba2abe2262216f662584d559ec932fb37b40b15121bbe8f21c31b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}