{
  "manageEntity": {
    "action": "Save",
    "entityId": "66813",
    "entityType": "Track",
    "nonce": "0xfcfeec2a4c5eb7e1964a5d5f556c5f2cf63e18a41dcab068e2100567ba9b50dc",
    "signature": "0xe34647f37b1ea91faa82a3b67d736621c6f4ad7deb9210a421fd86859f5070397e08105f716c2f40258a79969afb0013b367fcf6630e59325a44c413f6b432ac1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}