{
  "manageEntity": {
    "action": "Save",
    "entityId": "341087259",
    "entityType": "Track",
    "nonce": "0xe218b96fe33413ffd54e389ea99aed2aa91e4bd410bb960a42011eb209a9d064",
    "signature": "0xc0dfd945f5074542fb98c81a46cf87c81fc4d9044914accb9033d3fe6f68c8234ac61e39b630b5075522e07f9a4428934bca5de14f873816b1a951161bc99a271b",
    "signer": "0x4086Dda2D91F77cd46De0859a4de37F888508faA",
    "userId": "568518925"
  }
}