{
  "manageEntity": {
    "action": "Save",
    "entityId": "727658",
    "entityType": "Track",
    "nonce": "0x7f8e43aa1a80a18203494005fdee2b9e6ca6aa266d7560f7ba20509fa71fd223",
    "signature": "0x8f564ed7540b48117ba7e38ada01727a6dfb97c6734fa9ba1f3477f4c0518bac4d824c2e6deb7324d5e1d3793b2e3d49ee93f9151f7024fef6e4fdf43ddd90bc1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}