{
  "manageEntity": {
    "action": "Save",
    "entityId": "267791436",
    "entityType": "Track",
    "nonce": "0x2b758ef4f35a9dc5785662aa147189a9775f1eb065ee0baf61c35415abbcca47",
    "signature": "0x63e56b6769fa2090b5ce8046fbbf2ea09e39ec67a00ad525c4bc071de57a1e9c6d943ac7a075a410395ee01b03ce52566921e838447f8449a14197594d6b41c51b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}