{
  "manageEntity": {
    "action": "Save",
    "entityId": "616102984",
    "entityType": "Track",
    "nonce": "0x57fa81a594168777c59434970b263dba9b6ac0cbaf48fcbefe9add40371cbfc6",
    "signature": "0xb14c4aff9ba4f05dda4c729209b66d8d76689c877a8e5881e7e40d7350d224c71531cab8eec299cf35c99352e4f3b92594f0b8e45c2d1ca79791ff33bf2e1b421b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}