{
  "manageEntity": {
    "action": "Save",
    "entityId": "1145793711",
    "entityType": "Track",
    "nonce": "0xd1826c17d28f197ba0289182dfe774ef2ef640fe9e285a72f89f25263ee48ead",
    "signature": "0x19cb8b68fd5d18de6bdf01945ddc60b0c3ad4e9787664614ae6cc8b159c035f330951e1ead5599b54b7c1be4736b7ca1f76e921cbe839c2182649ba850afeb9f1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}